Appears to be on the GC thread. (monosgen)
mono sgen is calling CryptoNative_HmacUpdate, which then runs some java, before calling HMAC_Update in libcrypto.so (which is a native android lib that exists on my moto test device).
I don't understand why GC is calling CryptoNative_HmacUpdate but purhaps it's in a Finalizer somewhere?
I'm not aware my app is making any explicit SSL/TLS socket calls at start up. Although we do open a WebView / Android System Webview, so it could well be that.
Has anyone else seen crashes like this, especial with maui apps that use Webview's?
The crash happens after the Navigated event from the webView.
Crash still occurs when webview just navigates to <html><body>hello world</body></html>.
Crash does not occur when I don't add the webview.
--------- beginning of crash
10-13 12:00:55.355 13826 13923 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x20 in tid 13923 (.NET TP Worker), pid 13826 (?????)
10-13 12:00:55.497 13826 13826 I ????: Explicit concurrent copying GC freed 1120(70KB) AllocSpace objects, 0(0B) LOS objects, 49% free, 3874KB/7749KB, paused 118us total 93.853ms
10-13 12:00:55.503 13945 13945 I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone
10-13 12:00:55.505 1041 1041 I tombstoned: received crash request for pid 13923
10-13 12:00:55.511 13945 13945 I crash_dump64: performing dump of process 13826 (target tid = 13923)
10-13 12:00:55.523 13945 13945 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
10-13 12:00:55.523 13945 13945 F DEBUG : Build fingerprint: 'motorola/rav_retus/rav:11/RPJS31.Q1-53-12-17/62036b:user/release-keys'
10-13 12:00:55.523 13945 13945 F DEBUG : Revision: 'pvt1'
10-13 12:00:55.523 13945 13945 F DEBUG : ABI: 'arm64'
10-13 12:00:55.524 13945 13945 F DEBUG : Timestamp: 2023-10-13 12:00:55-0600
10-13 12:00:55.524 13945 13945 F DEBUG : pid: 13826, tid: 13923, name: .NET TP Worker >>> org.????? <<<
10-13 12:00:55.524 13945 13945 F DEBUG : uid: 10610
10-13 12:00:55.524 13945 13945 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x20
10-13 12:00:55.524 13945 13945 F DEBUG : Cause: null pointer dereference
10-13 12:00:55.524 13945 13945 F DEBUG : x0 0000000000000000 x1 0000006dd211b434 x2 000000000000000d x3 0000006e6646f65c
10-13 12:00:55.524 13945 13945 F DEBUG : x4 0000006dd211b338 x5 0000006dd211b441 x6 482073616d6f6854 x7 656c646e69482073
10-13 12:00:55.524 13945 13945 F DEBUG : x8 0000006e51d128b4 x9 000000000000000d x10 0000000000430000 x11 000000000000001e
10-13 12:00:55.524 13945 13945 F DEBUG : x12 0000000000000000 x13 0000006dd211b890 x14 0000000000000002 x15 00000000ebad6a89
10-13 12:00:55.524 13945 13945 F DEBUG : x16 0000006e51abb998 x17 0000006e51cfee74 x18 0000006dd1ddc000 x19 b400006f26a958d0
10-13 12:00:55.524 13945 13945 F DEBUG : x20 000000000000000d x21 0000000000000000 x22 b400006ed6afc770 x23 0000006dd211b8a4
10-13 12:00:55.524 13945 13945 F DEBUG : x24 0000006dd211b434 x25 0000006dd211e000 x26 0000000000000042 x27 0000000000000004
10-13 12:00:55.524 13945 13945 F DEBUG : x28 0000006dd211b8b0 x29 0000006dd211b3c0
10-13 12:00:55.524 13945 13945 F DEBUG : lr 0000006e51cfee88 sp 0000006dd211b3c0 pc 0000006e51d0ccac pst 0000000060000000
10-13 12:00:55.547 13826 13826 I Choreographer: Skipped 49 frames! The application may be doing too much work on its main thread.
10-13 12:00:55.556 1167 1167 I QTI PowerHAL: Power setMode: 5 to: 0
10-13 12:00:55.793 13945 13945 F DEBUG : backtrace:
10-13 12:00:55.793 13945 13945 F DEBUG : #00 pc 0000000000109cac /apex/com.android.conscrypt/lib64/libcrypto.so!libcrypto.so (offset 0xce000) (SHA256_Update+24) (BuildId: cd2ee7e33e7cd10990aac7097cc2fdc2)
10-13 12:00:55.793 13945 13945 F DEBUG : #01 pc 00000000000fbe84 /apex/com.android.conscrypt/lib64/libcrypto.so!libcrypto.so (offset 0xce000) (HMAC_Update+16) (BuildId: cd2ee7e33e7cd10990aac7097cc2fdc2)
10-13 12:00:55.793 13945 13945 F DEBUG : #02 pc 000000000001c31c /apex/com.android.conscrypt/lib64/libjavacrypto.so (NativeCrypto_HMAC_Update(_JNIEnv*, _jclass*, _jobject*, _jbyteArray*, int, int)+572) (BuildId: fc252985d5835aa1187d09ba9005ffc0)
10-13 12:00:55.793 13945 13945 F DEBUG : #03 pc 000000000013ced4 /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+148) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.793 13945 13945 F DEBUG : #04 pc 00000000001337e8 /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+568) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.793 13945 13945 F DEBUG : #05 pc 00000000001a8a94 /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+228) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.793 13945 13945 F DEBUG : #06 pc 0000000000319148 /apex/com.android.art/lib64/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+376) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.793 13945 13945 F DEBUG : #07 pc 000000000030f474 /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+996) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.793 13945 13945 F DEBUG : #08 pc 0000000000680e44 /apex/com.android.art/lib64/libart.so (MterpInvokeStatic+548) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #09 pc 000000000012d994 /apex/com.android.art/lib64/libart.so (mterp_op_invoke_static+20) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #10 pc 000000000002ca38 /apex/com.android.conscrypt/javalib/conscrypt.jar (com.android.org.conscrypt.OpenSSLMac$Hmac.engineUpdate+4)
10-13 12:00:55.794 13945 13945 F DEBUG : #11 pc 000000000067e18c /apex/com.android.art/lib64/libart.so (MterpInvokeVirtual+1520) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #12 pc 000000000012d814 /apex/com.android.art/lib64/libart.so (mterp_op_invoke_virtual+20) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #13 pc 000000000023ca4e /apex/com.android.art/javalib/core-oj.jar (javax.crypto.Mac.update+26)
10-13 12:00:55.794 13945 13945 F DEBUG : #14 pc 0000000000306a70 /apex/com.android.art/lib64/libart.so (art::interpreter::Execute(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame&, art::JValue, bool, bool) (.llvm.13423079315433257381)+268) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #15 pc 000000000066cbf4 /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+780) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #16 pc 000000000013cff8 /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #17 pc 0000000000133564 /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+548) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #18 pc 00000000001a8a78 /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+200) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #19 pc 0000000000556948 /apex/com.android.art/lib64/libart.so (art::JValue art::InvokeVirtualOrInterfaceWithVarArgs<art::ArtMethod*>(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, art::ArtMethod*, std::__va_list)+468) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #20 pc 0000000000556ae8 /apex/com.android.art/lib64/libart.so (art::JValue art::InvokeVirtualOrInterfaceWithVarArgs<_jmethodID*>(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, std::__va_list)+92) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #21 pc 0000000000414b6c /apex/com.android.art/lib64/libart.so (art::JNI<true>::CallVoidMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+660) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #22 pc 000000000037a2a0 /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallMethodV(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, std::__va_list, art::Primitive::Type, art::InvokeType)+2512) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #23 pc 00000000003682e0 /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallVoidMethod(_JNIEnv*, _jobject*, _jmethodID*, ...)+152) (BuildId: 0a722124e1d08ab1896df95b634bc489)
10-13 12:00:55.794 13945 13945 F DEBUG : #24 pc 0000000000012064 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.???-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libSystem.Security.Cryptography.Native.Android.so (CryptoNative_HmacUpdate+148) (BuildId: 56fb3e4cee9166a04c35402acc08a0af9513ad79)
10-13 12:00:55.794 13945 13945 F DEBUG : #25 pc 00000000001a9388 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.??????-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #26 pc 00000000001a7da8 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.?????-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #27 pc 000000000019d320 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.?????-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #28 pc 000000000019b074 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.????-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #29 pc 00000000000c5ed8 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.???-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #30 pc 000000000025e4b4 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.???-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (mono_runtime_invoke_checked+140) (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #31 pc 0000000000277440 /data/app/~~fwGew_P6fq7SfiMHLVwusg==/org.???-Vkz1EzfX8rJ5XFOctEN-tQ==/lib/arm64/libmonosgen-2.0.so (BuildId: 52812271e2ea141c4ee822ccadaad7c1d4fe3bb5)
10-13 12:00:55.794 13945 13945 F DEBUG : #32 pc 00000000000afce8 /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 1197163beea3f0b6686df3cb9bcee87c)
10-13 12:00:55.794 13945 13945 F DEBUG : #33 pc 00000000000502c8 /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 1197163beea3f0b6686df3cb9bcee87c)
UPDATE:
I had a bunch of background initialization that was being started via a Task.Run in the (MainPage) WebView::HandlerChanged event handler.
Moving this background initialization into MainActivity::OnCreate (Still using Task.Run), and I can no longer reproduce the crash (30+ full restarts and counting. Release as well as Debug builds).
My current guess is that there is some networking related setting change that is being made with this background initialization that is causing a conflict.
UPDATE:
Back again:
Time Device Name Type PID Tag Message
01-05 10:31:31.079 Motorola moto g fast Error 18659 DEBUG backtrace:
#00 pc 00000000000a3638 /apex/com.android.conscrypt/lib64/libcrypto.so (SHA256_Update+24) (BuildId: 60cf60ff7e510cd1487a9f2035c95128)
#01 pc 0000000000096e94 /apex/com.android.conscrypt/lib64/libcrypto.so (HMAC_Final+140) (BuildId: 60cf60ff7e510cd1487a9f2035c95128)
#02 pc 000000000001ded4 /apex/com.android.conscrypt/lib64/libjavacrypto.so (NativeCrypto_HMAC_Final(_JNIEnv*, _jclass*, _jobject*)+104) (BuildId: 40feb0ba06373f71e9c827cae9819953)
#03 pc 000000000013ced4 /apex/com.android.art/lib64/libart.so (art_quick_generic_jni_trampoline+148) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#04 pc 00000000001337e8 /apex/com.android.art/lib64/libart.so (art_quick_invoke_static_stub+568) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#05 pc 00000000001a8a94 /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+228) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#06 pc 0000000000319148 /apex/com.android.art/lib64/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+376) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#07 pc 000000000030f474 /apex/com.android.art/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+996) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#08 pc 0000000000680e44 /apex/com.android.art/lib64/libart.so (MterpInvokeStatic+548) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#09 pc 000000000012d994 /apex/com.android.art/lib64/libart.so (mterp_op_invoke_static+20) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#10 pc 000000000002ce78 /apex/com.android.conscrypt/javalib/conscrypt.jar (com.android.org.conscrypt.OpenSSLMac$Hmac.doFinal+4)
#11 pc 000000000067e18c /apex/com.android.art/lib64/libart.so (MterpInvokeVirtual+1520) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#12 pc 000000000012d814 /apex/com.android.art/lib64/libart.so (mterp_op_invoke_virtual+20) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#13 pc 000000000002cf2c /apex/com.android.conscrypt/javalib/conscrypt.jar (com.android.org.conscrypt.OpenSSLMac.engineDoFinal)
#14 pc 000000000067e18c /apex/com.android.art/lib64/libart.so (MterpInvokeVirtual+1520) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#15 pc 000000000012d814 /apex/com.android.art/lib64/libart.so (mterp_op_invoke_virtual+20) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#16 pc 000000000023c3c6 /apex/com.android.art/javalib/core-oj.jar (javax.crypto.Mac.doFinal+18)
#17 pc 0000000000306a70 /apex/com.android.art/lib64/libart.so (art::interpreter::Execute(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame&, art::JValue, bool, bool) (.llvm.13423079315433257381)+268) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#18 pc 000000000066cbf4 /apex/com.android.art/lib64/libart.so (artQuickToInterpreterBridge+780) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#19 pc 000000000013cff8 /apex/com.android.art/lib64/libart.so (art_quick_to_interpreter_bridge+88) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#20 pc 0000000000133564 /apex/com.android.art/lib64/libart.so (art_quick_invoke_stub+548) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#21 pc 00000000001a8a78 /apex/com.android.art/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+200) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#22 pc 0000000000556948 /apex/com.android.art/lib64/libart.so (art::JValue art::InvokeVirtualOrInterfaceWithVarArgs<art::ArtMethod*>(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, art::ArtMethod*, std::__va_list)+468) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#23 pc 0000000000556ae8 /apex/com.android.art/lib64/libart.so (art::JValue art::InvokeVirtualOrInterfaceWithVarArgs<_jmethodID*>(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, std::__va_list)+92) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#24 pc 0000000000408620 /apex/com.android.art/lib64/libart.so (art::JNI<true>::CallObjectMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+656) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#25 pc 0000000000379ec0 /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallMethodV(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, std::__va_list, art::Primitive::Type, art::InvokeType)+1520) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#26 pc 0000000000367638 /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallObjectMethod(_JNIEnv*, _jobject*, _jmethodID*, ...)+152) (BuildId: 0a722124e1d08ab1896df95b634bc489)
#27 pc 0000000000012110 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libSystem.Security.Cryptography.Native.Android.so (CryptoNative_HmacFinal+100) (BuildId: f2ad2be69afc021121a2b468ca26975d675de2f8)
#28 pc 00000000001a91d0 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#29 pc 00000000001a7bf0 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#30 pc 000000000019d168 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#31 pc 000000000019aebc /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#32 pc 00000000000c5ef8 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#33 pc 000000000025e33c /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (mono_runtime_invoke_checked+140) (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#34 pc 00000000002772c8 /data/app/~~4je-EEc6sMLZokUr8KbgKg==/org.???-FxYAeFYM4oeAublQXnDvxw==/lib/arm64/libmonosgen-2.0.so (BuildId: 943992f94e0687d44fe2a2fc0648c7cc473eee93)
#35 pc 00000000000afce8 /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 1197163beea3f0b6686df3cb9bcee87c)
#36 pc 00000000000502c8 /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 1197163beea3f0b6686df3cb9bcee87c)
UPDATE:
setting some mono debugging options setprop debug.mono.log "gc,assembly"
yielded some interesting warnings:
Time Device Name Type PID Tag Message
01-09 10:49:20.429 Motorola moto g fast Debug 15414 monodroid-assembly Entry 'CryptoNative_HmacFinal' from library 'libSystem.Security.Cryptography.Native.Android' already loaded by another thread
01-09 10:49:20.427 Motorola moto g fast Debug 15414 monodroid-assembly Entry 'CryptoNative_HmacUpdate' from library 'libSystem.Security.Cryptography.Native.Android' already loaded by another thread
(Non crash startups don't appear to show these Debug messages)
Creating a new instance of the
NetworkCredentialclass at the same time as doing WebView initialization caused the segfault.My current hypothesis is that the Android
SecureStringimplementation (that theNetworkCredentialclass uses) is implemented viaCryptoNativecalls.My Solution/Workaround for this issue was to ensure all NetworkCredential operations were done on the same thread as the WebView initialization, preventing any issues caused by lack of thread safety.